The number of possible values of the squarefree kernel (A007947) shared by at least two solutions x to A056239(x) = n.
A088318
The number of possible values of the squarefree kernel (A007947) shared by at least two solutions x to A056239(x) = n.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =1a(6) =2a(7) =3a(8) =5a(9) =7a(10) =10a(11) =13a(12) =18a(13) =24a(14) =32a(15) =40a(16) =51a(17) =66a(18) =83a(19) =103a(20) =128a(21) =158a(22) =194a(23) =237a(24) =288a(25) =348a(26) =419a(27) =500a(28) =601a(29) =718
External references
- oeis: A088318